Improved apparatus for turning crank-pins on locomotive driving-wheels



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CHARLES J. CLIFFORD, OF NEW HAMITON, NEW JERSEY.'

l Lettera Patent No. 68,415, dated September 3, 1867.

IMPROVED APPARATUS FOR TURNING (iRANK-PIN S 0N LOGOMOTIVB DRIVING-WHEELS.

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Be it known that I, CHARLES J. CLIFFORD, of the town of New Hampton, in thc county of Hunterdon, and State of New Jersey, have invented certain Improvements in Machines for Turning and Truing Crank-Pins in Locomotive Wheels without removingthe pin from the wheel; and I do hereby declare the following to be a full and exact' description of the same, reference being herein had to the drawings that accompany this speci`1' cation, and which make part of the same. S

The nature of my improvement consists in making use of the centre in the outer extremity ot' the pin that remainsas when the pin was first turned in its original truth; and also of the collar on the inner extremity next the wheel, which having been without friction or wear remains as originally turned, as the guides and base of the movements of the machinery by which the worn pin is restored to its originally true bearing after having been worn oblong or cut from friction by use.

I construct a. frame, A, with two end pieces, tt and b, two cross-bars, c and d, and a slide, e, for a tool-post, f, and tool, y; the arms or end pieces a and b being so curved or bent as to make the face of' the slide e stand upon a line radiating from the centre or middle of the crank-pin B while resting on the two cross-bars c and d. The arm t has a projection, t, on its outside. Inside of the projectionvis a screw, i, with a centre pin, 7', in its inner end, as shown in fig. 2. The screwz'is also hollow, and has inside a centre bolt, k, thus forming centre points easily adjustable to varied distances by the use of pins inserted .in the holes shown in the screws. The

arm b, as shown in fig. 3, has a circular hole larger than the collar on the crank-pin, into which rings, vm', are closelyfttetl. As'crank-pins andtheir collars vary in size in different wheels, the loose rings are easily Iittcd thereto and inserted for use into the arm b, and are kept from turning thereon by dowel-pins. The 'centre pin being inserted in the original contre in outer extremity of crank-pin, with tho arm b set upon the collar at the other end of the crank-pin, the whole machine is held in place for its voperation by the pressure upon the centre pin of the boltc of the bar C, which bar is held in place by bolts clamped to the rirn of the locomotive wheel, and by adjustable nut-s at the end of the bolts passing through the bar at its extremities. The machine being adjusted to its required steadiness for operation by ,the adjustablescre-ws on the' arm n, is secured in position by the jam-nut s on the screw z', and jam-nut ton ki The machine is caused to revolve round the crank-pin by means of the wheel E fast to the arm a, which revolves therewith, motion-being communicated by the pinion G that is attached to and operated upon the stationary bar C.

What I claim as my improvement, and desire to secure by Letters Patent, is-

The frame A, constructed as described, in combination with the screws and k, frame C, and the operating mechanism, all constructed and arranged as sct forth.

CHAS. J. CLIFFORD.

Witnesses:

W. M. GooDINe, HENRY WILSON. 

